DUCOM TRIBOMETERS LUBRICANT TESTING APPLICATIONS
This document focuses on instruments especially suited for Lubricant Testing applications. For detailed information about specific instruments, please contact Ducom:
[email protected]
DUCOM THE TRIBOLOGY COMPANY
mailto:[email protected]
Ducom Instruments (Since 1978)
35 YEARS IN TRIBOLOGY
Largest range of tribometers in the world:
- almost all tribo-testing requirements
- over 100 standard tribometers
- over 1200 labs worldwide
Tribometers manufactured in AS9100 certified space grade manufacturing
facility - (parts have landed on the moon)
DEVELOPMENT PARTNERSHIPS: Uni of Groningen (Netherlands)
Rush University (USA)
BITS Pilani (India)
National Metallurgic Lab (India)
DUCOM THE TRIBOLOGY COMPANY
Our Locations and Representations
OUR LOCATIONS
Chicago (USA) Ducom European B.V. Groningen, The Netherlands
DUCOM THE TRIBOLOGY COMPANY
Ducom Instruments (USA) Evanston, IL
Ducom Instruments (India) Bangalore, KA
Lubricant Testers Bearing Testers Mechanical Tester Tribometers
Our relationship with tribology
Ducom Expertise in Tribological Testing and Test Methods
DUCOM THE TRIBOLOGY COMPANY
Range of products by Ducom Instruments
DUCOM THE TRIBOLOGY COMPANY
TRIBOMETERS LUBRICANT TESTERS
- Abrasion Tester - Four Ball Tester
- Gas (Air) Jet Erosion Tester - High Temperature Grease Tester
- Slurry Jet Erosion Tester - Low Temperature Torque Tester
- Linear Recip. Tribometer - Pin on Vee Block Tester
- Micro Pin on Disk - Reichert Tester
- Macro Pin on Disk - Timken OK Load Tester
- Roller on Roller Tribometer - Tapping Torque Tester - TriboChemist
- Shear Stability Tester - Slurry Erosion Tester
MECHANICAL TESTERS BEARING TESTERS
- Automated Indentation Tester - Journal Bearing Tester
- Scratch Tester - Journal Bearing Tester (Advanced)
- Roller Element Bearing Tester
These tribometers are especially relevant to the Lubricating Oils, Greases and Additive Studies
TEST INSTRUMENTS OF SPECIFIC INTEREST TO LUBRICATING OILS, GREASES AND ADDITIVES
DUCOM THE TRIBOLOGY COMPANY
LINEAR RECIPROCATING TRIBOMETER
DUCOM THE TRIBOLOGY COMPANY
Ducom Linear Reciprocating Tribometer
DUCOM THE TRIBOLOGY COMPANY
DUCOM LINEAR RECIPROCATING TRIBOMETER SET UP FOR LUBRICANT ADDITIVE TESTING
Materials and lubricants are often subjected to repeated back and forth (reciprocating) movement, in many real applications, from automotive to biotribological environments. High variety of sample geometries available in order to study: Point contact / Line contact / Area contact
(friction data recorded in both forward stroke and reverse. Up to four results can be viewed in the same graph for comparison)
for Additives and Lubricants
DUCOM THE TRIBOLOGY COMPANY
Ducom Linear Reciprocating Tribometer
SOME OPTIONS
OPTION FOR HUMIDITY CONTROL
OPTION FOR TEMPERATURE CONTROL
LUBRICATION CUP
ENVIRONMENTAL CHAMBER (10 95% RH)
LOW TEMPERATURE STAGE (-25 Deg C)
HIGH TEMPERATURE STAGE (+400 Deg C)
ELECTRICAL CONTACT RESISTANCE (ECR) measurement
CCD BASED IMAGE ACQUISITION SYSTEM for sample imaging and reporting
3D OPTICAL PROFILOMETER
Long Stroke
Low Frequency
Medium Stroke
Medium Frequency
Short Stroke
High Frequency
Load
Fretting
Sliding
Frictional Force vs. Stroke Length Linear Reciprocating Tribometer
Measured Frictional Force vs. Measured Stroke, given the energy loss per cycle
Frictional Force vs. Cycles vs. Stroke Linear Reciprocating Tribometer
DUCOM THE TRIBOLOGY COMPANY
Energy Loss (Frictional Force vs. Stroke) over the Number of Reciprocating Cycles
(excellent representation of the energy lost over the duration of the test)
ROLLER ON ROLLER TRIBOMETER
DUCOM THE TRIBOLOGY COMPANY
Roller on Roller Tribometer
Friction and wear evaluation of materials and lubricants in sliding/rolling configurations
13 Copyright Ducom Instruments (2009)
Excellent tool for lube and dry tribology studies! Roll / Slide full servo control
Variety of adapters
for Materials, Lubricants and Additives
TEST VARIABLES
LOAD
SPEED
TEMPERATURE
SPEED-ROLL COMBINATION
14 Copyright Ducom Instruments (2009)
Useful for Materials, Lubricants and Additives!
Choice of Manual / Automated loading systems
SERVO CONTROLLED ROLLER #2. User defined speed and direction of rotation for controlled slip and roll. Choice of holders for variety of contacts types.
Lubricant Sump
Lubricant Heater
SERVO CONTROLLED ROLLER #1. User defined speed and direction of rotation for controlled slip and roll. Choice of holders for variety of contacts types.
Roller on Roller Tribometer for Materials, Lubricants and
Additives
Roller on Roller Tribometer
15 Copyright Ducom Instruments (2009)
for Materials, Lubricants and Additives
(load & vibration VS time)
MAIN EQUIPMENT
LUBRICATION FEEDER SYSTEM for lubricated wear and friction studies
GREASE FEEDER SYSTEM for grease lubricated wear and friction studies
HIGH TEMPERATURE MODULE (up to 120 C, for heating lube reservoir)
CCD BASED IMAGE AQCUISITION SYSTEM for sample imaging
3D OPTICAL PROFILOMETER for post test analysis
(wear & vibration VS time)
PARAMETERS UNIT MIN MAX
SPEED RPM 1 2000
TEST LOAD N 0 1000
LUBRICANT TEMPERATURE
Deg C Ambient 120
WEAR MEASUREMENT
m 0 2000
WEAR RESOLUTION
m
1
TRIBOCHEMIST
DUCOM THE TRIBOLOGY COMPANY
TRIBOCHEMIST
In situ analytical technique
Tribological films can be measured as they are formed under steady-state conditions
in situ ATR analysis allows users to correlate tribological conditions such as normal load and velocity directly to with changes in the chemistry of the lubricant/metal surface interface.
Applications:
1. Lubricant additives development
2. Fundamental lubricant film studies
NEW
17 Copyright Ducom Instruments (2009)
for Additives and Lubricants
Specifications Parameter Unit Min Max
Test load N 10 50
Stroke length mm 10 20
Frequency Hz 5 10
Test cylinder (diameter X length) mm 10 X 50
TriboChemist - as an in situ analytical technique has the advantage that the ATR spectra of growing thermal/or tribological films can be measured as they are formed under steady-state conditions, through a thin metallic film representing one of the rubbing surfaces.
The in situ ATR analysis allows users to correlate tribological conditions such as normal load and velocity directly to with changes in the chemistry of the lubricant/metal surface interface.
In the case of lubricant additives development the TriboChemist Tribometer by Ducom allows the kinetics of formation of tribofilms and the relative roles of tribochemical and thermochemical processes to be investigated.
*Specifications subject to change without prior notice. Detailed specifications can be provided on request.
EX
AM
PLE R
ESEAR
CH
ON
THE T
RIB
OC
HEM
IST A
T ETH, Z
UR
ICH
- SW
ITZERLA
ND
Tribochemistry of zinc dialkyldithiophosphates (ZnDTP)
In-Situ tribochemical research at ETH, Zurich focuses on the application of in situ ATR FT-IR Tribometry to the study of tribofilms formed from solutions of organophosphate additives (ZnDTP) in poly-a-olefin (PAO) lubricant on an iron-coated germanium ATR crystal.
Changes in the ATR FT-IR spectrum of the near-surface region due to thermal and/or tribo-chemical reactions occurring between the lubricant additive and the iron surface have been investigated as a function of time. The ATR results on the surface reaction of ZnDTP under purely thermal conditions indicate the formation of P-O-P bonds, characteristic of polyphosphates (Figure 2). The modification of the ZnDTP molecule with the formation of (POO)- species, detected after friction at 150C (Figure 3), could be an intermediate stage in the formation of inorganic phosphate.
Example result 1 Example result 2
ATR FT-IR spectra of 20wt% solution of ZnDTP in PAO, acquired during sliding at 150C.
Refernces:
1. F.Piras, A. Rossi, N. D. Spencer, In-situ attenuated total reflection (ATR), spectroscopic analysis of tribological phenomena, Trib. Ser.40, "Boundary and Mixed Lubrication: Science and Application", 199-206, 2002
2. F. Piras, A. Rossi, N.D. Spencer, The growth of tribological films: in situ characterization based on Attenuated Total Reflection Infrared Spectroscopy, Langmuir, 18, 6606-6613, 2002
3. F. M. Piras, A. Rossi, N. D. Spencer, Combined in-situ (FT-IR) and ex-situ (XPS) study of ZnDTP - iron surface interaction, Tribology Letters, 15 (3), 181 - 191, 2003.
ATR FT-IR spectra of 20wt% solution of ZnDTP in PAO, collected during heating at 150C.
http://www.surface.mat.ethz.ch/research/tribology/tribochemistry/former_projects/in_situ_atr_ft_ir_tribometry/picture3/hires_imagehttp://www.surface.mat.ethz.ch/research/tribology/trib
